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authorChristoph Hellwig <hch@lst.de>2020-07-19 09:21:50 +0200
committerDavid S. Miller <davem@davemloft.net>2020-07-20 03:26:42 +0200
commit1eec69580414bd9f9be00ab2cf7b69d44adcae17 (patch)
tree413ae7d4d11d6172787e0d3beb202845e0b57795 /net/sctp/socket.c
parentsctp: pass a kernel pointer to sctp_setsockopt_default_sndinfo (diff)
downloadlinux-1eec69580414bd9f9be00ab2cf7b69d44adcae17.tar.xz
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sctp: pass a kernel pointer to sctp_setsockopt_primary_addr
Use the kernel pointer that sctp_setsockopt has available instead of directly handling the user pointer. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 6695fa1cb0ca..abdec7b412bc 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2982,10 +2982,9 @@ static int sctp_setsockopt_default_sndinfo(struct sock *sk,
* the association primary. The enclosed address must be one of the
* association peer's addresses.
*/
-static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval,
+static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim,
unsigned int optlen)
{
- struct sctp_prim prim;
struct sctp_transport *trans;
struct sctp_af *af;
int err;
@@ -2993,21 +2992,18 @@ static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval,
if (optlen != sizeof(struct sctp_prim))
return -EINVAL;
- if (copy_from_user(&prim, optval, sizeof(struct sctp_prim)))
- return -EFAULT;
-
/* Allow security module to validate address but need address len. */
- af = sctp_get_af_specific(prim.ssp_addr.ss_family);
+ af = sctp_get_af_specific(prim->ssp_addr.ss_family);
if (!af)
return -EINVAL;
err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR,
- (struct sockaddr *)&prim.ssp_addr,
+ (struct sockaddr *)&prim->ssp_addr,
af->sockaddr_len);
if (err)
return err;
- trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id);
+ trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id);
if (!trans)
return -EINVAL;
@@ -4695,7 +4691,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen);
break;
case SCTP_PRIMARY_ADDR:
- retval = sctp_setsockopt_primary_addr(sk, optval, optlen);
+ retval = sctp_setsockopt_primary_addr(sk, kopt, optlen);
break;
case SCTP_SET_PEER_PRIMARY_ADDR:
retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen);